[USN-7992-2] Inetutils vulnerability

[noreply+usn-bot at canonical.com]

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Ubuntu Security Notice USN-7992-2
February 18, 2026

inetutils vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Inetutils could allow unintended access to network services.

Software Description:
- inetutils: Collection of common network programs

Details:

USN-7992-1 fixed vulnerabilities in telnetd in Inetutils. This update
provides the corresponding update for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
and Ubuntu 20.04 LTS.

Original advisory details:

 Kyu Neushwaistein discovered that telnetd in Inetutils incorrectly handled
 certain environment variables. A remote attacker could use this issue to
 bypass authentication and open a session as an administrator.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS
  inetutils-telnetd               2:1.9.4-11ubuntu0.2+esm3
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  inetutils-telnetd               2:1.9.4-3ubuntu0.1+esm4
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  inetutils-telnetd               2:1.9.4-1ubuntu0.1~esm5
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-7992-2
  https://ubuntu.com/security/notices/USN-7992-1
  CVE-2026-24061
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